These basket strainers will help to keep your downspouts flowing and (if you have them) your storm drains running. Clogged downspouts can damage walls, inside and out, give you a wet basement, and cause erosion. These strainers may be easily bent to fit in any opening round or square. Use copper for copper downspouts, aluminum for aluminum downspouts, and galvanized for galvanized downspouts. Clean your gutters when leaves accumulate. 3 Inch Round Galvanized Gutter Strainer 3" Galv.$4.29, 10/$38.60 4 Inch Round Galvanized Gutter Strainer 4" Galv.$6.99, 10/$63.00 3 Inch Round Aluminum 3 Inch Round Aluminum$3.79, 10/$34.10 4 Inch Round Aluminum 4 Inch Round Aluminum$6.99, 10/$63.00 3 Inch Copper Gutter Strainer 3" Copper$6.99, 10/$63.00 4 Inch Copper Gutter Strainer 4" Copper$11.99, 10/$100.00 5 Inch CopperMeasures 4" diameter at waist and 5-1/4" at largest diameter. Gutter Strainer 5" Copper$21.99 6 Inch CopperMeasures 5 inch diameter at waist and 6-1/4" at largest diameter. Gutter Strainer 6" Copper$26.99 3 Inch Expanded Aluminum Downspout StrainerEconomical expanded aluminum downspout strainer. 049821210595$2.69 4 Inch Expanded Aluminum Downspout StrainerEconomical expanded aluminum downspout strainer. Fits 4" round and 3" x 4" rectangular. 21448$2.69